Contestants from Group A perform hits like "SexyBack", "Just Give Me a Reason", "The Door", "La Bamba" and "Mad World".

Ken Jeong, Rita Ora, Robin Thicke, Jenny McCarthy Wahlberg, and Nick Cannon open the show in costume with a hilarious rendition of Rockstar by Smashmouth. The Masked Singer is celebrating the 30th anniversary of the incredible animation studio, DreamWorks, that brought the magic of Shrek to the world! Then, Group A channels their inner fairytale by performing songs from or inspired by the Shrek-cellent movie franchise from "Accidentally In Love" to "Hallelujah", "I'm A Believer", and "Wide Awake".

Robin Thicke opens the show alongside Group A's Ant, Paparazzo, and Coral. Then, Group A serenades the audience with some of the Rat Pack's most iconic classics, including "Luck Be A Lady", "Fever", "That's Amore", and "My Way!" Two of these headliners move on to the lucky six at the end of the night but not before an epic Battle Royale.

Five new masks appear as the Voices of Olympus; contestants perform showstopping renditions of "I Believe In a Thing Called Love", "Bad Blood", "Rewrite the Stars", "Espresso" and "Saving All My Love For You".

The panelists transform into ghost busting detectives along with an iconic visit from an original Ghostbuster, Ernie Hudson! Group B ain't afraid of no ghosts! They bring the house down with amazing performances of "(Don't Fear) The Reaper", "Disturbia", "Cleanin' Up The Town", and "Radioactive" before one celebrity must reveal themselves.

The Group B finalists open the show with some southern charm and a rockstar performance of "Save A Horse (Ride A Cowboy)" before impressing the audience with renditions of, "Here You Come Again", Take Me Home, Country Roads", and "Something In The Water". Then, the show will close with an epic Battle Royale to see who will be unmasked and who will advance to the Lucky Six. Sitting in for panelist Rita Ora is comedian and country music superfan, Casey Wilson!